ESTIMATEDDate confidence: ESTIMATEDA target, not a fixed dateHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all ESTIMATED pins65% CONFIDENCEOverall confidence: 65%How well the pin's source and references back up its dates.Weighted average of how firmly 6 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins from 50% to 74% confidence
The V&A and Cooper Hewitt[6] both date the teapot 1971 and the Centre Pompidou[2] lists the "Service Drop" as 1971, but the Philadelphia Museum of Art says c. 1970 and an auction house says production in white porcelain began in 1970. No exact launch day is published.Luigi Colani's organic "Drop" porcelain tea service for Rosenthal's Studio-Line was made in 1970-71 and later entered the Cooper Hewitt and V&A collections. Museums date it 1970 or 1971, so the pin sits on the start of 1971.
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